$ perl -v | grep version
This is perl 5, version 12, subversion 2 (v5.12.2) built for i686-linux-thread-multi

$ time perl a.pl -port=12347
server:274522 client:274522 cycles: 1960.793/sec^C

real    2m20.175s
user    1m40.466s
sys     0m44.603s